Compare 20/90 and 2/80
20/90 is greater than 2/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
20/90 = 20 × 8/90 × 8 = 160/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
2/80 = 2 × 9/80 × 9 = 18/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 160/720 > 18/720 or 20/90 > 2/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90 and 2/80 20/90 and 4/80 60/90 and 2/80 20/90 and 6/80 20/90 and 10/80 20/90 and 14/80